Schorl and Feldspar Cluster – NERS 014

Schorl and Feldspar Cluster - Erongo Region, Namibia

Measurements:  55 x 51 x 27 mm

Description:  A cluster of lustrous black tourmaline (schorl) crystals with feldspar. Despite some damage to a few of the crystals, the specimen displays well.

Weight of Specimen:  43 g

Chemical Composition:  NaFe2+3Al6Si6O18(BO3)3(OH)4  (schorl)
                                       KAlSi3O8  (feldspar)  

Hardness on Mohs Scale:  (schorl)  7.5
                                         (feldspar)  6 - 6.5

Location:  Erongo Mountains, Erongo Region, Namibia.

Specimen Code:  NERS 014

US $ 55

                            
                    

                 



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